installing python onto my Bluehost server via ssh/terminal

Installing python 2.7 onto my bluehost account via SSH. I'm using their installing document. I'm at the part where I have to edit my bashrc file. I'm confuse as to what to do...

They say to add export PATH=$HOME/python/Python-2.7.2/:$PATH to my bashrc script which is fine but I'm not sure if I'm replacing what I already have in there which is - PATH=$PATH:$HOME/bin.

Do I replace what I have or add export PATH=$HOME/python/Python-2.7.2/:$PATH above PATH=$PATH:$HOME/bin?